Primer for small-arms ammunition



, ful Improvements in FFiE,

HARLEY T. rnox, or LEBANON, omo, nssrenoa TO THE PETERS cenrarnon com.-PANY, or cmcmnarr, OHIO, A .conromrron or omo.

PRIMER FOR SMALL-ARMS AMMUNITION.

No Drawing.

To all whom it may concern:

Be it known that I, HARLEY T. PECK, a citizen of the United States,residing at Lebanon, in the county of Warren and State of Ohio, haveinvented certain new and use.- Primers for Small- Arms Ammunition, ofwhich the following is a specification.

This invention has for its object the provision of primers for smallarms ammunition which shall be of improved composition and efliciency.

The invention is exemplified in the composition of material described inthe following specification, larly pointed out'in the appended claims.

At present there are two well-known types of small arms primers, namely,center fire and rim fire primers. A center fire primer is composed of abrass, copper or gliding metal cup into which is loaded under pressurethe explosive compound which is ce mented or held in place by gum,collodion, or some other adhesive, or it may be covered by a paper ortinfoil disc'which is held in place by a similar adhesive. Therim fireprimers are contained in the head of the cartridge case'within theannular rim or cavity provided for this purpose. The priming compositionis introduced by means of centrifugal force and projected outwardly fromthe center into the cavity. It isheld in place by gum, collodion,,orsome suitable adhesive.

Specifically my invention relates to a priming composition of whichtri-nitroresorcinol is an ingredient. Tri-nitrore orcinol has 'achemical formula of C (N 3 (OH) 2 and is represented graphically by thefollowing formula:

. o. 0, The use of tri-nitro-resorcinol as an ingredient of primingmixtures is specifically designed to provide a primer which will burn ina progressive manner g1v1ng a flame Specification of Letters Patent.

and it is more particu Patented Feb. 28, 1922.

Application filed December 15, 1919. Serial No. 3&5,044.

of long duration and intense heat. Trinitro-resorcinol as a primingmixture ingredient ,is superior in that it produces a primer which ismore uniform in sensitive, ness and therefore the tendency to misfire ismuch more easily controlled than in other primers. Many of the morerecently developed smokeless powders which are designed for the purposeof producing a slow rate of combustion and improved ballistics have one.fault, namely, that they are diflicult' of ignition. A primercontaining tri-nitro-resorcinol according to the present invention is ofsuch superior quality that it ignites with great ease the latesttypes,of improved progressive powders.

In preparing a primer according to the present invention a primingcomposition comprising substantially potassium chlorate, 35% fulminateof mercury, and 30% antimony sulphide maybe used, to. which may be added5% or more of trinitro-resorcinol. Five per cent of tri-nitroresorcinolis sufiicient in most cases to produce the effect desired. If stillgreater ignition powers are wished a larger amount attri-nitro-res'orcinol may be added. Another priming composition mayconsist of approximately 5% of tri-nitro-resorcinol added to a rim firepriming composition comprising the following: 40% fulminate of mer-.cury, 40% ground glass, 20% potassium chlorate.

Another composition may include potassium chlorate, 20% antimonysulphide, 30% lead or copper sulphocyanide to which mixture 5% or moretri-nitro-resorcinol is added.

In some cases less than 5% tri nitro-resorcinol may be used, and thetri-nitro-re- 2. A priming composition for ammunition comprising anexplosive mixture contaming approximately 5% trl-nltro-resorcinol.

3. A priming composition for ammuni which 'is added tri-nitro-resorcinolto cause 10 tion COIIlpllSlHg a fulminate explosive mixthe mixture toburn in a progressive manner ture containing tri-nitro-resorcinol. andto impart uniformity in sensitiveness 4. A priming com-position forammunithereto.

5 tion comprising a fulminate explosive mix- In testimony whereof I havesigned my ture containing, approximately 5%tri-nitroname to thisspecification on this 9th day of 15 resorcinol. December, A. D. 1919.

5. A. priming composition for ammunition comprising an explosive mixtureto HARLEY T. PECK.

